Track drill



Dec. 11, 1928. 1,695,062

R. ROSTRON TRACK DRILL Filed March 14, 1925 3 Sheets-Sheet 1 De c. 11,- 1928. v 1,695,062

R. ROSTRON TRACK DRILL Filed March 14, 1925 3 Slpo0s-5heet 2 28 R. ROSTRON TRACK DRILL Filed Me ch 14, 1925 3 sums-sum 3 Dec. 11,1928, v 1,695,062

1257' V6 72 Z027? 5 01mm aw cw Patented. Dec. 11,1928.

"UNITED'H'ST ROBERT ROS'JIRON,

Ares;

TRACK DRILL. v i

Application filed March 14, 1925. Serial No 15,482.

invention relates to track drills and 1 has for its object the provision .of a power drill before or during the operation of the drill .of improved .general construction and having particular features of advantage, among which may be mentioned an improved device for clamping the .drill to the ra l means for effecting ready and complete ad ustment of said clamping device to insure effective clamping of the railnnderal-l conditions and torender it possible todrill saidrail at various predetermined points in the height thereof; means for'lubricating the track-and latter; means associated with the power mechanism of the drill for preventing overheating of the motor in service and an improved device for moving the drill nto. and out of operative relationwith the rail.

. Numerousother objects and advantages of the invention will be apparent as it is better understood from the following'description,

which, taken in connectionwith the accompanying drawings, discloses a preferred embodiment thereof.

Referring to the drawings, Figure 1 is a side elevation of a track drill in which my invefntionis embodied;

Fig. 2 isan end elevation thereof, looking toward the right in Fig. 1, certain parts being broken away for convenience in llustration'v Fig. 3is a sectional view, takens'ubstanti-allyupon the section line 33 1 n Fig. 1, certam parts being shown in elevat1on;- 1 Fig. 4 is a horizontal sectional VIEW, taken substantially on the section l ne 4-'4 in Fig.2;

.Fig. 5 is a sectional "View, taken su-bstantiallyon the 'sectionline '5'5 in F1g.,3, the position of the operating lever on the clamping device when said device in clamping engagement with the rail being shown 1n dotted lines I 6 is a similar view, showing the movable member of the clamping device out of engagement, the correspondingposition of the operating lever' being shown in dotted lines;and

Fig. 7. is a partial vertical section ofthe interengaging parts of the drill frame and clamping device. 7 j v I Upon said drawings, illustrating the best v manner in which I have thus far contemplated applying the principles of my inven main frame of the apparatus, in which is rotatably mounted adrill spindle 12, carrying a drill 13 which, in the present instance, is power driven by means of a motor 14, a motor shaft 15 and gears 16,;17- and18 operatively connecting the shaft 15 and -drillspindle 12. The shaft15 has bearings -19 and 21 in the frame and at-its right hand end, viewing Fig.

E T;oFFlcE.

oroin'cneo, ILLINOIS, ASSIGNQR To Canaan, An'Aivis-aoo, or CHICAGO, ILLINOIS, A CORPORATION 01% ILLINOIS.

1,.carries a'sprocket 23 driven by a chain 24 taking over a sprocket 25 adapted to be rotated by means of ahandle 26 to start the motor. Uprights 27 extend upwardly from the frame and are connected atthe topby a I cross piece 28 providing a handle for carrying the apparatus from place to place or moving the same along the rail. A. fuel tank29 is supported from said uprights andcommuni- I cably connected by means of a conduit 31 with the motor 14.

The apparatus is adapted tobe positioned upon the rail, which I have indicated by the reference character 32, and secured thereto 1 by means of a n adjustable clamping device which will now be described. Said device comprises an outer plate 33, 'having teeth 34 onthe inner side thereof adapted to mesh 7 with teeth 35 ontheouter face of aside wall 36 forming a partfofthe frame 11, said plate being vertically adjustable upon. said wall and'being adapted to .beclamped' in place by means of bolts, 37 extending through slots 38. Bearing members 39 are carried upon rods 41 extending rearwardly from the plate 33 at the uppercorners-thereof and ashaft 42 extends through bearings 43 formed in the lower endsof said members .39. Shafts 44, extendingthrough said bearing members and the endsof theplate 33, are threaded at their inner ends, asindica-ted at 45 to receive wing nuts .46 and have rollers 47 mountedthereon and adapted to support the device for movement, on therail. Coil springs are positionedupon the. shafts .44; and tend tohold the, rollers 47 and the bearingmembers 39 in the outermost position permitted by ad.

justment of the wing nuts 46. It will be ap-' parent that said bearing members and rollers 1 may be adjusted laterallybymeans of said nuts. Said shaft 42 has eccentrics- 48 thereon rotatablewithin rail clamping members 49 which have upward extensions 51 slotted at their upper ends, as indicated at 52, to receive pins 53extending out from the bearing members 39, thus causing the flat clamping faces of saidmembers49 to be always maintained in proper relationship to the rail. The eccentrics48 are so formed as to cause a quick inward initial movement of said mem-' bers 49 and thence relatively slight movement for a given movement of the operating lever, thus greatly increasing the leverage. An operating lever 54 is mounted upon a square end 55 of said shaft 42 and is disposed at one side of the apparatus in position to be readily accessible to the operator. Spaced extensions 56 are formed at the bottom of the plate 33 and serve as clamping jaws to engage the rail at the side thereof opposite the members 49 and it will be evident that by turning said lever 54 from the raised position shown in Fig. 6 to the horizontal position shown in Figs. 1 and 5, said members 49 are moved inwardly and caused to tightly engage said rail, thus holding the apparatus in fixed relationship thereto. Inasmuch as the bearing members 39 may be moved in and out, the clamping device may be adjusted to fit upon rails of di erent width and kept in proper adjustment for tight engagement therewith at all times. The entire device is vertically adj ustable, as hereinbefore pointed out, and may be firmly held in different positions of vertical adjustment by reason of the inter-meshing teeth 34 and 35.

The drill spindle 12 is adapted to be moved endwise by means of a hand lever 57, pivoted at 58 in the frame and rigidly connected with an arm 59, formed at the end thereof to engage within a grooved collar 62 upon said spindle 12. A thrust bearing 77 is provided adjacent to said collar and the rear end of the spindle 12 is disposed within a sleeve 78, which is slotted, as indicated at79, a guide pin 81 being provided in the end of the spindle and slidable in the slots of said sleeve. When said pin reaches the forward end of the slots, said sleeve is moved with the spindle and it will be evident that b thus telescoping the parts, the length of te housing 82 in which the ends thereof are disposed may be materially reduced. Said lever 57 is normally held in upright position by means of a catch 63 on one ofthe uprights 27. r

A bracket 64 extends outwardly from said uprights to provide a bearing for a stud 65 upon which the sprocket 25 is mounted.

For the purpose of lubricating the rail in the area of the drill hole, a small pump 66 may be positioned upon one end of a frame 11 and provided with a plunger 67 adapted to be manually operated by the foot, if desired, to project the lubricant through a pipe 68 onto the Web of the rail above the point of contact with the drill.

For the purpose of preventing overheating of the motor, I provide a small fan 69 disposed in a housing 71 and mounted upon a shaft 72, having bearings in a bracket 73 extending upwardly from the bearing 19, said shaft carrying at the lower end thereofa beveled friction disk 74, held by a spring 75 upon said shaft 72in contact with a fly-wheel 76 upon the shaft 15. As will be noted, the motor 14 is disposed on the side ofthe rail opposite the main frame and drill housing, thus distributing the wei ht of thU apparatus in such manner as to of the same upon the rail and it will be evident that when the clamping members 49 are retract-ed, the apparatus may be rolled along the rail by an operator holding the cross piece or handle 28.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing facilitate the supporting from the spirit and scope of the invention,

or sacrificingall of its material advantages, the form hereinbefore described being merely a preferred embodimentthereof.

I claim: 1 i i 1. In an apparatus for drilling tracks and the like, the combinationof a main frame, a drill carried thereby, means for rotating said drill, a device for firmly holding said main frame and drill in operative position to the rail comprising a separate and independent carriage, said carriage and main frame having complemental adjustably connectable parts for permitting their relative vertical adjustment, said carriage having a plate adapted to lie on one side of the rail and having the lower portion thereof adapted to grip the side of said rail, said plate having laterally extending rods formed with bearing members, shafts passing through said bearing members and plate, rollers on said shafts, said rollers adapted to rest upon the top of said rail, a shaft carried by said bearing mem bers and lying transversely to said first-mew tioned shafts, complemental rail clamping members carried by said last-named shaft, and means for angularly moving said lastnamed shaft to cause said complemental rail clamping member to grip said rail. i

2. In an apparatus for drilling tracks and the like,the combination of a main frame, a drill. housed in said main frame, means for rotating said drill, and a device for clamping the apparatus to the rail with said drill in operative relation to the latter, said device comprising a carriage wholly separate from and attachable to the mainframe, said carriage and main frame having complemental adjusting parts to permit their relative vertical. adjustment, said carriage comprising spaced apart bearings lying on opposite sides of the rail, shafts carried by said bearings, each of said shafts having a wing nut adapted to engage one of said bearings, a roller on each shaft and a coil spring adapted normally to bearings, a clamping jaw on said transverse shaft, and means for shifting said transverse shaft to operate said clamping aw.

3. In apparatus for drilling tracks and the like, the combination of a main frame, a drill housed in said frame, mechanism for rotating said drill, and a device for clamping the apparatus to the rail with said drill in operative relation to the latter, said device comprising a unit attachable to said frame and including rail clamping parts, one of which is movable toward and from the rail, an eccentric shaft for moving said part into and out of engagement with the rail, a manipulative member for turning said shaft, laterally adjustable bearings for the shaft, a laterally adjustable roller supporting the apparatus for movement along the rail, said roller being movable with said bearings in adjustment of the latter, and a spring for yieldingly holding said roller and hearings in the outermost position permitted by the extent of adjustment thereof.

4;. In an apparatus for drilling tracks and the like comprising in combination a frame, a drill carried thereby and means for rotating said drill, a rail clamping carriage connected to said frame, said carriage comprising a plate adapted to lie on one side of said rail and provided with a rail clamping jaw to engage one side of the rail, said plate having laterally extending bolts, depending bearings from each bolt, a shaft mounted in said plate and in each bearing and overlying the top of said rail, a roller on each shaft adapted to roll on the top of said rail, a transverse shaft carried by the lower portions of eachdepending bearing, a lever on the end of said transverse shaft, said transverse shaft having eccentric members rotatable with said shaft, rail clamping members surrounding said eccentrics and shiftable thereby into and out of contact with the side of said rail, said rail clamping members having upward extensions provided with furcations, pins in said furcations, said pins extending outwardly from each bearing member whereby to cause the clamping members to be maintained in proper relationship to the rail.

5. In an apparatus for drilling tracks and the like, the combination of a frame, a drill carried thereby, and means for rotating said drill, a device for clamping the apparatus to a rail with the drill in operative relation thereto comprising a carriage carried by said main frame, said carriage comprising a plate having a lower portion forming a rail clamping jaw, said plate at its upper portion having laterally extending bolts, each bolt having a depending bearing carried thereby, means for adjusting the bearings toward and from said plate,'a shaft having one end carried by each bearing and its opposite end car ried by the'plate, a roller on each shaft, a coil spring surrounding each shaft and adapted to press the roller and bearing outwardly, and means on the end of the shaft for pressing the bearing and roller inwardly, a transverse shaft carried by said bearing and a clamping jaw carried by said transverse shaft and means for operating said clamping jaw to grip the rail.

6. In an apparatus for drilling rails and the like, the combination of a mainframe, said frame having a lower portion, a drill mounted therein and projecting forwardly so as \to be in operative position against the side of the rail, said main frame having an upwardly extending portion adapted to overlie the top of the rail when in position, said overlying portion of the main frame having a vertically extending face, a prime mover carried by the upper portion of said main frame, said prime mover being adapted to lie on one side of said rail and overhanging the same when the main frame is in position on the ra1l, the shaft of said prime mover being carried by the upper portion .of said a main frame and extending transversely with respect to the rail when the main frame is in operative position, and means operated from said main shaft for rotating said'drill, said shaft having a fly wheel carried thereby" and spacedfrom said prime mover a distance so as to lie on the opposite side of the rail when the main frame is in position on said rail, a clamping carriage adapted to be .adjustably connected to said main frame and to hold said main frame rigidly to said rail, said carriage having a plate provided with a vertical face,,said vertical face of the plate and vertical face of the main frame having a series of interengaging parts adapted to permit their relative vertical adjustment, and rail clamping members carried by said carriage and means for operating said clampmg members to grip the rail. I ROBERT ROSTRON. 

